Datasheet

Section 10 I/O Ports
R01UH0310EJ0500 Rev. 5.00 Page 595 of 1384
Sep 25, 2012
H8S/2426, H8S/2426R, H8S/2424 Group
10.7.5 Pin Functions
Port 8 pins also function as SCI I/Os, interrupt inputs, EXDMAC I/Os, PPG outputs, TPU I/Os,
and 8-bit timer I/Os. The correspondence between the register specification and the pin functions
is shown below.
(1) Pin Functions of H8S/2426 Group and H8S/2426R Group
• P85/EDACK3/IRQ5-B/SCK3/PO5-B/TIOCB4-B/TMO1-B
The pin function is switched as shown below according to the combination of the operating
mode, bit EXPE, TPU channel 4 settings (by bits MD3 to MD0 in TMDR_4, bits IOB3 to
IOB0 in TIOR_4, and bits CCLR1 and CCLR0 in TCR_4), bits OS3 to OS0 in TCSR_1 of the
8-bit timer, bit NDER5 in NDERL of the PPG, bit AMS in EDMDR_3 of the EXDMAC, bit
C/A in SMR_3 and bits CKE0 and CKE1 in SCR_3 of the SCI, bits PPGS, TPUS, and TMRS
in PFCR3, bit P85DDR, and bit ITS5 in ITSR of the interrupt controller.
• Modes 1, 2, and 4 Modes 3 and 7 (EXPE = 1)
TPU channel
4 settings
(1) in table
below
(2) in table below
OS3 to OS0 ⎯ All 0 Not all 0
AMS ⎯ 0 1 ⎯
CKE1 ⎯ 0 1 ⎯ ⎯
C/A ⎯ 0 1 ⎯ ⎯ ⎯
CKE0 ⎯ 0 1 ⎯ ⎯ ⎯ ⎯
P85DDR ⎯ 0 1 1 ⎯ ⎯ ⎯ ⎯ ⎯
NDER5 ⎯ ⎯ 0 1 ⎯ ⎯ ⎯ ⎯ ⎯
P85 input P85
output
PO5-B
output*
3
SCK3
output
SCK3
output
SCK3
input
EDACK3
output
TMO1-B
output*
5
TIOCB4-B
output*
4
TIOCB4-B input*
2
*
4
Pin function
IRQ5-B interrupt input*
1